Answer:
(D) The market for good x is characterized by a positive externality.
Explanation:
The presence of a positive externality implies that a negligible social advantage is more noteworthy than a peripheral private strength. For instance, in thinking about the market for instruction, free markets would supply amount Q at value P. On the off chance that the outer advantage is incorporated, the socially productive yield ascends to amount.
Positive externalities lead to under-utilization and market disappointment. Government arrangements to expand interest for merchandise with positive externalities incorporate it effectively .